Visitors that never leave and Sims that sleep in each other's beds!

Whenever a Sim visits they stay until I take them with my Sim to another lot and then leave without them. It's the only way to get them off of my lot. They sleep, eat, shower, live with my sims until I force them off the lot by traveling with them to another lot. It's really annoying, and it has stopped me from allowing visitors. If I have a party -- everyone stays!!!

My other issue is that my Sims sleep in whichever bed they feel like, which has messed with my others sims that sleep in the same bed's relationship and ruined dates, etc.

I also almost had a Sim die of exhaustion because I thought when they tool themselves to sleep that they were going to "sleep" not "nap"!!!

I would love these bugs to be fixed.

Side note -- I understand that to eliminate lag EA made every lot needed to be traveled to but why couldn't they make it more like the Sims3 on the PS3 where lots within your neighborhood were fine but another neighborhood had to be loaded?

I just want to want visitors again.... and for my sims to sleep in their own beds -- mostly.